I have a question about the appending data from multiple rounds of surveys across 10 countries from the Demographic and Health surveys data.

When I append multiple rounds/surveys, all my value labels are messed up. For example, the "region" variable seemed to include only the value labels from the last data appended. So, if country A has regions 1 2 3, and country B has regions 3 4 5, I would expect the appended data to include all 6 regions. But in my case, only regions 3 4 5 are populated.

Do you have any hints, strategies to synchronize the value labels, given your experience?

Than, Yawo